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<html lang="en">
<head>
    <meta charset="UTF-8">
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    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script src="../js/vue.js"></script>
    <div id ="app">
        <p>中国古典十大名曲为：{{array|join}}</p>
        <p>中国古典十大名曲为：{{array|join('、')}}</p>
        <p>中国古典十大名曲为：{{array|join('《','》')}}</p>
    </div>
    <script>
        let app = new Vue({
            el:"#app",
            data:{ 
                array:['高山流水','梅花三弄','夕阳萧鼓','汉宫秋月','阳春白雪','渔樵问答','胡笳十八拍','广陵散','平沙落雁','十面埋伏']
            },
            filters:{
                join:function(val,...marks){
                    var length=marks.length
                    if(length==2){
                        return val.map((v)=>{
                            return marks[0]+v+marks[1]
                        }).join('')
                    }else if(length==1){
                        return val.join(marks[0])
                    }else{
                        return val.join(',')
                    }
                }
            }
        })
    </script>
</body>
</html>